Precambrian Perspectives

The Precambrian record is interpreted in terms of an evolutionary progression that moves in the direction of increasing continental stability. An early, highly mobile microplate tectonics phase progressed through a more stable, largely intracratonic, ensialic, mobile belt phase to the modern macropl...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1981-07, Vol.213 (4503), p.55-61
Main Author: Goodwin, Alan M.
Format: Article
Language:English
Subjects:
Anorthosite
Archean eon
Cratons
Geology
Orogeny
Paleogeophysics
Plate tectonics
Proterozoic eon
Rocks
Solid Earth
Tectonics
Volcanic rocks
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Summary:The Precambrian record is interpreted in terms of an evolutionary progression that moves in the direction of increasing continental stability. An early, highly mobile microplate tectonics phase progressed through a more stable, largely intracratonic, ensialic, mobile belt phase to the modern macroplate tectonics phase that involves large, rigid lithospheric plates. Various phases are characterized by distinctive crustal associations. Three controls--bulk earth heat production, crustal fractionation and cratonization, and atmospheric oxygen accumulation--are viewed as the cumulative cause of the trends and events that characterize the crust at different stages of development, from its inception approximately 4.6 billion years ago to the present.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.213.4503.55